John F.W. Stephan & Johanna Fristcom Stephan

Looking for information on John F.W. Stephan and Johanna Fristcom Stephan.They are great-great grandparents born in Dromsdorf (John) and Eckersburg, Germany and married in Eckersburg, Germany.Had two children - Ernest C. and Charles.Have history of Ernest C.Have no record of Charles other than went to Illinois and married and had three daughters.There were also brothers and sisters who did not come to America.Does anyone have any history of John F. and Johanna in Germany or the family that did not come to America?